“Are Values Clamped from 0.0 to 1.0? - No,

you can use the full range supported. GL_RGBA32F_ARB, GL_RGB32F_ARB, GL_ALPHA32F_ARB, GL_INTENSITY32F_ARB, GL_LUMINANCE32F_ARB, GL_LUMINANCE_ALPHA32F_ARB for 32 bit floats.

GL_RGBA16F_ARB, GL_RGB16F_ARB, GL_ALPHA16F_ARB, GL_INTENSITY16F_ARB, GL_LUMINANCE16F_ARB, GL_LUMINANCE_ALPHA16F_ARB for 16 bit floats.”